Scrolling through hundreds of pages just to spot a price drop feels impossible. My trick is to skip Amazon's own storefront and go straight to the Kindle subreddit; people there are ridiculously fast at spotting and posting deals, especially on genre-specific days. The 'Daily Deals' email is hit or miss—mostly the same bestsellers on rotation.
I've had better luck setting up price alerts on sites like ereaderIQ. It tracks your wishlist and sends an email the second a book hits your target price, including those elusive 99-cent promos. That's how I snagged 'Project Hail Mary' for cheap way before it blew up. Honestly, most of the best discounts are from indie authors or small presses trying to build visibility, so if you're into niche genres like cozy mysteries or military sci-fi, you'll feast.